Pulp-strainer.



No. 736,215. PATENTED AUG. '11. 1 903 F. M 60 0. B. CHAPMAN & F.MONAUGHTON.

PULP STRAINER.

APPLICATION FILED NOV. 28, 1902.

N0 MDDBL. 2 SHEETS-SHEET 1.

No. 736,215. PATENTED AUG. 11; 1903. P. M; & G. B. CHAPMAN & F.MoNAUGHTON.

PULP STRAINER. APPLICATION FILED NOV. 2a. 1902.

'2 SHEETS-SHEET 2.

N0 MODEL.

Iatented August 11, 1903.

Erica;

FRANK M. CHAPMAN, oHARLEs E. CHAPMAN, AND FRED MCNAUGHTON, E

FORT EDWARD, NEW YORK. I

PULP-STRAINER.

SPEGIEICATION forming part Of Letters Patent N 0. 736,215, dated August11, 1903.

Application filed November 28, 1902. Serial No. 133,109. (No model.)

the following to be a full, clear, and exact no .description oftheinvention, such as will enable others skilled in the art to which itappertains to make and use the same.

Our invention relates to improvements in pulp-strainers for paper makingmachines.

It consists, essentially, in imparting an eccentric motion to thestrainer-plates of a class of strainers in which the plates are placedin a horizontal position.

It also consists in creating suction by means of a fan placed in acompartment immediately below the strainer-plates whereby the pulp isdrawn through said strainer or screen.

The invention also consists in the details of construction, arrangement,and combina- 2 5 tion of parts hereinafter described, and moreparticularly pointed out in the claims.

In the accompanying drawings, showing the embodiment-of our invention,in which like reference characters indicate similar and correspondingparts, Figure 1 is an elevation of our improvement. Fig. 2 is a verticallongitudinal section, and Fig. 3 is a plane of our invention.

Referring more particularly to the drawings, 1 is a frame having securedto one side thereof a bent or goosenecked pipe 2, the outlet of which islocated directly above the center of thestrainer 3 and adapted to feedthe raw material thereon. Said strainer is pref- 4o erably circular, andthe strainer-plates 3 are fixed upon aframe 3 which is seated on top ofthe shaft 4 and rests firmly upon the guard 5 of the upper chamber 6.Said shaft projects down into the lower chamber 7, where 4 5 the fan 8is mounted thereon out below said lower chamber,wl1 ereon is mounted apulley 9. a The shaft has a slight offset a near its upper extremityjust above the supportingbrace lOat the bottom of the upper chamber togive the screen or strainer an eccentric motion. The upper chamber has atrough or gutter 6, adapted to receive the refuse which is thrown orjarred into it by the eccentric motion of the screen. Said trough orgutter is'separated from the lower receiver of the chamber by theabove-mentioned guard and has a suitable outlet 6 The lower chamber alsohas a suitable outlet 7 a on one side through which the strained"material is conveyed. The screen as a Whole rests upon sup- 6o portersor legs 11.

In operating our invention the raw material is fed through the bent pipe2 from the strainer 3, where it is distributed overits surface by theeccentric mot-ion of said strainer, 6

the refuse being thrown out into the trough 6 and carried 0% through theoutlet 6 while the pulp is drawn down by the suction of the fan belowinto the lower chamber 7, where it is forced by the centrifugal motionof the fan to its proper outlet 7 on the side.

Having thus described our invention,- what we claim as new, and desireto secure by Letters Patent, is

1 In a pulp-strainer of the character described, the combination with areceiving chamber of a shaft rotating therein, a screen mounted on saidshaft, said shaft having an ofiset to give an eccentric motion to saidscreen whereby the raw material is distrib- 8o uted over said screen andthe refuse is jarred or thrown therefrom.

2. In a pulp-strainer of the character described, the combination of afan mounted upon a shaft in a receiving-chamber immediately below thestrainer, said shaft extending above into an upper chamber forconnection with said strainer and through the bottom of saidreceiving-chamber for connection with a means for actuation.

3. In a'pulp-strainer of the character de scribed, the combination of ascreen seated upon an oifset of the shaft, the edge of said screenresting upon a guard, said guard separating the trough or gutter fromthe lower receiving-chamber.

4. In apulp-strainer of the character de- In testimony whereof We afiixour signascribed, the combination with a receivingtures in presence oftwo Witnesses. tank of a shaft rotating therein, a screen FRANK M.CHAPMAN. mounted on a shaft, said shaft having an off- CHARLES E.CHAPMAN. set to give an eccentric motionto said screen, FRED MCNAUGHTON.and a fan mounted immediately below said Witnesses: screen, the edge ofsaid screen resting upon S. M. GRACE,

a guard. CAROLINE E. CHAPMAN.

